http://www.florentflament.com/blog/setting-keystone-v3-domains.html

The Openstack Identity v3 API, provided by Keystone, offers features that were lacking in the previous version. Among these features, it introduces the concept of domains, allowing isolation of projects and users. For instance, an administrator allowed to create projects and users in a given domain, may not have any right in another one. While these features look very exciting, some configuration needs to be done to have a working identity v3 service with domains properly set.

Keystone API protection section of the developer's doc provides hints about how to set-up a multi-domain installation. Starting from there, I describe the full steps to have a multi-domain setup running, by using curl to send http requests and jq to parse the json answers.

Setting an admin domain and a cloud admin

First, we have to start on a fresh non multi-domain installation with the default policy file.

  • With the admin user we can create the admin_domain.

    ADMIN_TOKEN=$(\
    curl http://localhost:5000/v3/auth/tokens \
    -s \
    -i \
    -H "Content-Type: application/json" \
    -d '
    {
    "auth": {
    "identity": {
    "methods": [
    "password"
    ],
    "password": {
    "user": {
    "domain": {
    "name": "Default"
    },
    "name": "admin",
    "password": "password"
    }
    }
    },
    "scope": {
    "project": {
    "domain": {
    "name": "Default"
    },
    "name": "admin"
    }
    }
    }
    }' | grep ^X-Subject-Token: | awk '{print $2}' ) ID_ADMIN_DOMAIN=$(\
    curl http://localhost:5000/v3/domains \
    -s \
    -H "X-Auth-Token: $ADMIN_TOKEN" \
    -H "Content-Type: application/json" \
    -d '
    {
    "domain": {
    "enabled": true,
    "name": "admin_domain"
    }
    }' | jq .domain.id | tr -d '"' ) echo "ID of domain cloud: $ID_ADMIN_DOMAIN"
  • Then we can create our cloud_admin user, within the admin_domain domain.

    ID_CLOUD_ADMIN=$(\
    curl http://localhost:5000/v3/users \
    -s \
    -H "X-Auth-Token: $ADMIN_TOKEN" \
    -H "Content-Type: application/json" \
    -d "
    {
    \"user\": {
    \"description\": \"Cloud administrator\",
    \"domain_id\": \"$ID_ADMIN_DOMAIN\",
    \"enabled\": true,
    \"name\": \"cloud_admin\",
    \"password\": \"password\"
    }
    }" | jq .user.id | tr -d '"' ) echo "ID of user cloud_admin: $ID_CLOUD_ADMIN"
  • And we grant to our user cloud_admin the admin role on domain admin_domain.

    ADMIN_ROLE_ID=$(\
    curl http://localhost:5000/v3/roles?name=admin \
    -s \
    -H "X-Auth-Token: $ADMIN_TOKEN" \
    | jq .roles[0].id | tr -d '"' ) curl -X PUT http://localhost:5000/v3/domains/${ID_ADMIN_DOMAIN}/users/${ID_CLOUD_ADMIN}/roles/${ADMIN_ROLE_ID} \
    -s \
    -i \
    -H "X-Auth-Token: $ADMIN_TOKEN" \
    -H "Content-Type: application/json" curl http://localhost:5000/v3/domains/${ID_ADMIN_DOMAIN}/users/${ID_CLOUD_ADMIN}/roles\
    -s \
    -H "X-Auth-Token: $ADMIN_TOKEN" | jq .roles
  • Once the admin_domain has been created with its cloud_admin user, we can enforce a domain based policy. In order to do that, we have to copy the policy.v3cloudsample.json file over our former /etc/keystone/policy.json, while replacing the string admin_domain_id by the ID of the admin_domain we just created. Locate the policy.v3cloudsample.json file into the etc directory of Keystone's source.

    sed s/admin_domain_id/${ID_ADMIN_DOMAIN}/ \
    < policy.v3cloudsample.json \
    > /etc/keystone/policy.json

Warning, current version (commit 19620076f587f925c5d2fa59780c1a80dde15db2) of policy.v3cloudsample.json doesn't allow cloud_admin to manage users in other domains than its own (see bug 1267187). Until the patch is merged, I suggest using this policy.c3cloudsample.json under review.

Creating domains and admins

From now on, the admin user can only manage projects and users in the Default domain. To create other domains we will have to authenticate with the cloud_admin user created above.

  • Getting a token scoped on the admin_domain, for user cloud_admin.

    CLOUD_ADMIN_TOKEN=$(\
    curl http://localhost:5000/v3/auth/tokens \
    -s \
    -i \
    -H "Content-Type: application/json" \
    -d '
    {
    "auth": {
    "identity": {
    "methods": [
    "password"
    ],
    "password": {
    "user": {
    "domain": {
    "name": "admin_domain"
    },
    "name": "cloud_admin",
    "password": "password"
    }
    }
    },
    "scope": {
    "domain": {
    "name": "admin_domain"
    }
    }
    }
    }' | grep ^X-Subject-Token: | awk '{print $2}' )
  • Creating domains dom1 and dom2.

    ID_DOM1=$(\
    curl http://localhost:5000/v3/domains \
    -s \
    -H "X-Auth-Token: $CLOUD_ADMIN_TOKEN" \
    -H "Content-Type: application/json" \
    -d '
    {
    "domain": {
    "enabled": true,
    "name": "dom1"
    }
    }' | jq .domain.id | tr -d '"') echo "ID of dom1: $ID_DOM1" ID_DOM2=$(\
    curl http://localhost:5000/v3/domains \
    -s \
    -H "X-Auth-Token: $CLOUD_ADMIN_TOKEN" \
    -H "Content-Type: application/json" \
    -d '
    {
    "domain": {
    "enabled": true,
    "name": "dom2"
    }
    }' | jq .domain.id | tr -d '"') echo "ID of dom2: $ID_DOM2"
  • Now we will create a user adm1 in domain dom1.

    ID_ADM1=$(\
    curl http://localhost:5000/v3/users \
    -s \
    -H "X-Auth-Token: $CLOUD_ADMIN_TOKEN" \
    -H "Content-Type: application/json" \
    -d "
    {
    \"user\": {
    \"description\": \"Administrator of domain dom1\",
    \"domain_id\": \"$ID_DOM1\",
    \"enabled\": true,
    \"name\": \"adm1\",
    \"password\": \"password\"
    }
    }" | jq .user.id | tr -d '"') echo "ID of user adm1: $ID_ADM1"
  • We will also grant the admin role on domain dom1 to this adm1 user.

    curl -X PUT http://localhost:5000/v3/domains/${ID_DOM1}/users/${ID_ADM1}/roles/${ADMIN_ROLE_ID} \
    -s \
    -i \
    -H "X-Auth-Token: $CLOUD_ADMIN_TOKEN" \
    -H "Content-Type: application/json" curl http://localhost:5000/v3/domains/${ID_DOM1}/users/${ID_ADM1}/roles \
    -s \
    -H "X-Auth-Token: $CLOUD_ADMIN_TOKEN" | jq .roles

Creating projects and users

The adm1 user can now fully manage domain dom1. He is allowed to manage as many projects and users as he wishes within dom1, while not being able to access resources of domain dom2.

  • Now we authenticate as user adm1 with a scope on dom1.

    ADM1_TOKEN=$(\
    curl http://localhost:5000/v3/auth/tokens \
    -s \
    -i \
    -H "Content-Type: application/json" \
    -d '
    {
    "auth": {
    "identity": {
    "methods": [
    "password"
    ],
    "password": {
    "user": {
    "domain": {
    "name": "dom1"
    },
    "name": "adm1",
    "password": "password"
    }
    }
    },
    "scope": {
    "domain": {
    "name": "dom1"
    }
    }
    }
    }' | grep ^X-Subject-Token: | awk '{print $2}' )
  • We create a project prj1 in domain dom1.

    ID_PRJ1=$(\
    curl http://localhost:5000/v3/projects \
    -s \
    -H "X-Auth-Token: $ADM1_TOKEN" \
    -H "Content-Type: application/json" \
    -d "
    {
    \"project\": {
    \"enabled\": true,
    \"domain_id\": \"$ID_DOM1\",
    \"name\": \"prj1\"
    }\
    }" | jq .project.id | tr -d '"' ) echo "ID of prj1: $ID_PRJ1"
  • When trying and creating a project in domain dom2, it fails.

    curl http://localhost:5000/v3/projects \
    -s \
    -H "X-Auth-Token: $ADM1_TOKEN" \
    -H "Content-Type: application/json" \
    -d "
    {
    \"project\": {
    \"enabled\": true,
    \"domain_id\": \"$ID_DOM2\",
    \"name\": \"prj2\"
    }\
    }" | jq .
  • Creating a standard user usr1 in domain dom1, with default project prj1.

    ID_USR1=$(\
    curl http://localhost:5000/v3/users \
    -s \
    -H "X-Auth-Token: $ADM1_TOKEN" \
    -H "Content-Type: application/json" \
    -d "
    {
    \"user\": {
    \"default_project_id\": \"$ID_PRJ1\",
    \"description\": \"Just a user of dom1\",
    \"domain_id\": \"$ID_DOM1\",
    \"enabled\": true,
    \"name\": \"usr1\",
    \"password\": \"password\"
    }
    }" | jq .user.id | tr -d '"' ) echo "ID of user usr1: $ID_USR1"
  • Granting Member role to user usr1 on project prj1.

    MEMBER_ROLE_ID=$(\
    curl http://localhost:5000/v3/roles?name=Member \
    -s \
    -H "X-Auth-Token: $ADM1_TOKEN" \
    | jq .roles[0].id | tr -d '"' ) curl -X PUT http://localhost:5000/v3/projects/${ID_PRJ1}/users/${ID_USR1}/roles/${MEMBER_ROLE_ID} \
    -s \
    -i \
    -H "X-Auth-Token: $ADM1_TOKEN" \
    -H "Content-Type: application/json" curl http://localhost:5000/v3/projects/${ID_PRJ1}/users/${ID_USR1}/roles \
    -s \
    -H "X-Auth-Token: $ADM1_TOKEN" | jq .roles

The domain administrator adm1 ended up creating a project prj1 and a user usr1 member of the project. usr1 can now get a token scoped onprj1 and manage resources into this project.

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